CHICAGO (DTN) -- More farmers are going to be faced with documenting their environmental practices and reducing fertilizer usage when selling to certain markets.

Laura Sands, a consultant with Vela Environmental, spoke Wednesday at the DTN/The Progressive Farmer Ag Summit about the growing environmental traceability pressures farmers will face in the future. Those pressures are largely being driven by major retailers. Sands said farmers will have to begin thinking about issues such as sustainability risk management. She also noted Walmart is sending out questionnaires to suppliers asking for more information about environmental performance and sourcing of basic commodities.

"Right now, ...

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